Patent · US Active

Drill, such as a twist drill

US7530772B2 · kind B2 · utility

10Cited by

8References

20Claims

0Family size

Assignee

KENNAMETAL INC. · US

Inventors

Werner Reinhardt · Gerolzhofen, DE
Tilo Krieg · Bad Mergentheim, DE

Key dates

Filing date	Nov 27, 2006
Grant date	May 12, 2009
Priority date	—
Expiry date	Jun 30, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/9097
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A drill bit, such as a twist drill, having a body equipped with flutes, as well as a drill bit face that includes two main cutting edges that merge together. In order to drill a blind hole, such as with a level drilled bottom, the main cutting edge forms a continuous cutting edge that runs in a plane perpendicular to the drill bit's longitudinal axis. The main cutting edges, with respect to a cutting direction, are arranged behind a center line lying in the plane which is perpendicular to the longitudinal axis of the drill and extending through the center of the drill as well as in the direction of the main cutting edges.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.